d-gdc, 147 bytes

Result

AC

Duration

1126ms

Code [DL]

import std.stdio;void main(){int b=0;char[] c,d,e;for(c=readln.dup;e=readln.dup,e;d=e)write(c);for(;d[++b]-75;){};for(;c[b]-84;)++c[b++];write(c);}

stdin

                                               T  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                      K           

stdout

                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                      !!!!!!!!!T  

stderr

strace